Hi

When my car is on idle and anything under about 1800 rpm there is a ticking noise thats a deeper sound than tappets.. im quite sure its not the tappets but im new to boxer engines and due to the way the layout is i find it hard to pinpoint.. any ideas ?

its a 93 wrx sti

Thanks

 

In take it you actually mean a 94 STI?
Does the car have any modifications?
Is there still a heat sink over the turbo??

Tony

 

Hi Tony,

Well its an L plate so i figured 93 ? its a limited run of 200 ? with mcrae signature seats ?

it has a FMIC.. and a different exhaust and air filter but thats it.

hmm what am i looking for like a metal shield ?

Mark

 

does it do it when cold or warm or both?

 

well its louder when cold its not very loud generally bit louder than tappets that need oing but a slightly deeper sound.. its a bit better when warm

 

It will be a 94 L reg do you know what oil is in there?
The heatshield is on the drivers side with a hot hand sign on, it covers the turbo.

Tony

 

does it use a lot of oil?

piston slap normally goes when warm so i would guess its something else.

 

ahh ok well i dont know what was in before and ive been following some posts on here and went for 15w 50 mobil 1 fully synthetic.. :S

Nope it doesnt have one of those on it

 

i dont think it does, ill be checking later i did a long trip yesterday so ill see later once its cold..

Were you onto somethng tony ?

Thanks

 

15w50 should be ok what fuel are you running?

Tony

 

i have been putting super unleaded in it

 

bump

 

guys any one got an idea given the info above ?

 

is anything lose or virbrating?

i know the injectors give a clicking noise but thats not to loud
has your exhaust got a resonator box in it? as on my00 i have a blitz nur spec r and i get the exhaust resonating though the car

with out hearing its hard to say

 

hmm well i have been under it and it sounds near the bottom but the engine is flat so i dont know if the pistons are there or not etc ?

 

type in piston slap on youtube and have a listen,

i got worried about mine and it turned out to be the exhaust

it was resonating which sounds like it come the back of the engine

when was it las serviced ?

 

Pistons are horizontally opposed in these engines (hence boxer) but it may be the exhaust, if it were the likes of the bottom end then you would hear the noise all the time.

Tony

 

will do guys thanks alot

 

Hi mate i have piston slap on my 98 scooby. Sounds like the pistons gonna come out the bonnet when starting from cold but ok when warm and fine when boosting and normal use. I have now done 12000 miles like it and not been a problem. Best way to tell is by stethescope to determine where the knock is comig from or just use a screwdriver with your ear on one end. A bottom end will get worse under load but slap will go away under load.Hope this helps.
Spen

 

i have a 93 wrx with piston slap since i got it. been fine for 20k miles and 18months later
sounds awful when cold, goes when warm.